Processing method for improving forming precision of 7A85 alloy extruded sheet large-size cylindrical part

The invention discloses a processing method for improving the forming precision of a 7A85 alloy extruded sheet large-size cylindrical part. The processing method comprises the following steps that a 7A85 alloy sheet with the thickness of 3-8 mm is obtained through extrusion forming; annealing treatm...

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Bibliographische Detailangaben
Hauptverfasser:	GAO WENLI, MAO GUOLING, LIU DONGYANG, ZHU CONGCONG, TONG GUANGZE
Format:	Patent
Sprache:	chi ; eng
Schlagworte:	ALLOYS AUXILIARY OPERATIONS USED IN CONNECTION WITH METAL-WORKINGWITHOUT ESSENTIALLY REMOVING MATERIAL CHANGING THE PHYSICAL STRUCTURE OF NON-FERROUS METALS ANDNON-FERROUS ALLOYS CHEMISTRY FERROUS OR NON-FERROUS ALLOYS MANUFACTURE OF METAL SHEETS, WIRE, RODS, TUBES OR PROFILES,OTHERWISE THAN BY ROLLING MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVINGMATERIAL METALLURGY PERFORMING OPERATIONS PUNCHING METAL TRANSPORTING TREATMENT OF ALLOYS OR NON-FERROUS METALS WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS ORPROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL
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Beschreibung
Zusammenfassung:	The invention discloses a processing method for improving the forming precision of a 7A85 alloy extruded sheet large-size cylindrical part. The processing method comprises the following steps that a 7A85 alloy sheet with the thickness of 3-8 mm is obtained through extrusion forming; annealing treatment is conducted; solution treatment is conducted; spraying quenching is conducted, the water spraying pressure ranges from 190 KPa to 205 KPa, the water flow density ranges from 45 L * m * S to 60 L * m * S , and the duration ranges from 8 s to 17 s; roll bending is conducted; and the sheet is placed in a part mold, ultrasonic vibration is introduced in the creep aging process, the frequency of the ultrasonic vibration is 1.8-2.0 Khz, the amplitude of the ultrasonic vibration is 18-25 microns, the time of the ultrasonic vibration is 13-20 min, the temperature of creep aging is 145-160 DEG C, and the time of creep aging is 20-30 h. The mechanical property and reliability of the 7A85 alloy she